externInstance.h

/*
 * SPDX-FileCopyrightText: 2013 Barefoot Networks, Inc.
 * Copyright 2013-present Barefoot Networks, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef FRONTENDS_P4_EXTERNINSTANCE_H_
#define FRONTENDS_P4_EXTERNINSTANCE_H_
 
#include <optional>
 
#include "frontends/p4/parameterSubstitution.h"
#include "lib/cstring.h"
 
namespace P4::IR {
class ConstructorCallExpression;
class Expression;
class IAnnotated;
class PathExpression;
class Type_Extern;
class TypeMap;
template <typename T>
class Vector;
}  // namespace P4::IR
 
namespace P4 {
 
class ReferenceMap;
class TypeMap;

struct ExternInstance final {
    const std::optional<cstring> name;          // The instance's name, if any.
    const IR::Expression *expression;           // The original expression passed to resolve().
    const IR::Type_Extern *type;                // The type of the instance.
    const IR::Vector<IR::Type> *typeArguments;  // The instance's type arguments;
    const IR::Vector<IR::Argument> *arguments;  // The instance's constructor arguments.
    ParameterSubstitution substitution;         // Mapping from parameter names to arguments
    const IR::IAnnotated *annotations;          // If non-null, the instance's annotations.

    static std::optional<ExternInstance> resolve(
        const IR::Expression *expr, ReferenceMap *refMap, TypeMap *typeMap,
        const std::optional<cstring> &defaultName = std::nullopt);

    static std::optional<ExternInstance> resolve(const IR::PathExpression *path,
                                                 ReferenceMap *refMap, TypeMap *typeMap);

    static std::optional<ExternInstance> resolve(
        const IR::ConstructorCallExpression *constructorCallExpr, ReferenceMap *refMap,
        TypeMap *typeMap, const std::optional<cstring> &name = std::nullopt);
};
 
}  // namespace P4
 
#endif /* FRONTENDS_P4_EXTERNINSTANCE_H_ */